Canadian columbine
Aquilegia canadensis · Ranunculaceae
The gardener's calendar
Ideal time to plant canadian columbine: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Blooming
- Spring to early summer (April-June)
- Mature size
- 24-36 inches tall, 12-18 inches wide
- Growth
- Moderate
- Hardiness
- Very hardy (-40°C)
- Origin
- North America
- Soil type
- Well-drained, rich in organic matter
Care
Light exposure
Canadian columbine prefers a semi-shaded or partially sunny location (2-4 hours of direct sunlight). In very hot climates, partial shade is ideal to keep the foliage cool. It can tolerate shade, but flowering will be less abundant.
Regular watering
Keep the soil consistently moist but not saturated during growth and blooming, especially during dry spells. In summer, increase watering during hot weather. Gradually reduce watering after flowering when the plant enters dormancy.
Soil preparation
Enrich the soil with compost or fine potting soil before planting. Columbine appreciates fertile, cool, well-drained soil, slightly acidic to neutral. Avoid waterlogged areas that promote root rot.
Moderate fertilizing
Apply balanced fertilizer in spring when vegetation starts. A light potassium boost before flowering stimulates flower production. Limit nitrogen applications, which would favor foliage at the expense of flowers.
Pruning and cleanup
Remove spent flowers to extend the blooming period and limit excessive self-seeding. In late autumn, cut the plant back to ground level. Remove foliage that is heavily infested with pests or disease.
Pest and disease monitoring
Watch for black spots on leaves (powdery mildew): improve air circulation and reduce leaf moisture. Aphids and spider mites can infest the plant during hot, dry weather. Good drainage prevents root rot.
Did you know?
Canadian columbine owes its name 'aquilegia' to the Latin word 'aquila' (eagle), because its flowers resemble the curved talons of the bird of prey. It is the floral emblem of Colorado, where it grows wild, and Native American peoples of North America traditionally used it for its medicinal properties, though the plant should be handled with caution.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.